In general, you animate
NURBS curves and NURBS surfaces by turning on the Auto Key button
and transforming sub-object attributes such as CV or point positions,
by animating the parameters that control dependent NURBS objects,
and so on.
You can't animate NURBS
object creation or creation parameters, or fundamental changes to
NURBS geometry such as adding or deleting CVs or points, attaching
objects, and so on.
To improve performance
while you animate your scene, make the surfaces in your NURBS model
. Modifiers treat nonrelational
surfaces as if they were independent CV surfaces: you can animate
the scene more efficiently, and then turn relational modeling back
on before you render.
Some NURBS editing operations
remove animation controllers.
Operations that Remove
The following operations
remove animation from a NURBS object or sub-object:
- Make Independent
This operation removes
the animation of anything directly dependent on the object.
- Break, Extend, Join and Zip, Refine,
Delete, Rebuild, Reparameterize, Close, Make Loft, Convert Curve,
and Convert Surface
Any operation that changes
the number of points or CVs in a curve or surface removes the animation
of all points or CVs that are lost.
The animation of the
point or CV being fused to the other point or CV (the second one
chosen) is lost. The first point or CV acquires the animation of